Camera module and electronic device

ABSTRACT

A camera module includes a metal yoke, a holding base, a plastic barrel, a plurality of plastic lens elements, a leaf spring pair and a coil element. The holding base is connected to the metal yoke and defines an inner space. The holding base has a through hole which is corresponding to an opening of the metal yoke. The plastic barrel is movably disposed in the inner space. The plastic lens elements are disposed in the plastic barrel. The leaf spring pair includes two leaf springs which are located on a same plane and connected to the plastic barrel. The coil element surrounds an outer surface of the plastic barrel and electrically connected to the leaf spring pair, wherein two ends of the coil element is connected to the leaf springs by a thermal pressing method.

RELATED APPLICATIONS

This application claims priority to Taiwan Application Serial Number107132666, filed Sep. 17, 2018, which is herein incorporated byreference.

BACKGROUND Technical Field

The present disclosure relates to a camera module. More particularly,the present disclosure relates to a camera module with autofocusfunction applicable to portable electronic devices and having.

Description of Related Art

In recent years, portable electronic devices have developed rapidly. Forexample, intelligent electronic devices and tablets have been filled inthe lives of modern people, and camera module mounted on portableelectronic devices has also prospered. However, as technology advances,the quality requirements of camera modules are becoming higher andhigher. Therefore, in addition to the improvement in optical design, thecamera module needs to be improved in manufacturing precision.

In a camera module equipped with autofocus function, the configuringrelationship and connecting method between components often affect thequality of the overall camera module, especially when the components areconnected by high heat welding, the applied high heat tends to affectthe state of other peripheral components, which causes the manufacturingyield of the camera module to be affected.

SUMMARY

According to an embodiment of the present disclosure, a camera moduleincludes a metal yoke, a holding base, a plastic barrel, a plurality ofplastic lens, a leaf spring pair, and a coil element. The metal yoke hasan opening. The holding base is connected to the metal yoke and definesan inner space. The holding base has a through hole which iscorresponding to the opening of the metal yoke. The plastic barrel ismovably disposed in the inner space. The plastic lens elements aredisposed in the plastic barrel. The leaf spring pair includes two leafsprings which are located on a same plane and connected to the plasticbarrel, wherein each of the leaf springs includes at least twopositioning holes for connecting to the plastic barrel. The coil elementsurrounds an outer surface of the plastic barrel and is electricallyconnected to the leaf spring pair, wherein one end of the coil elementis connected between the at least two positioning holes of one of theleaf springs, and the other end of the coil element is connected betweenthe at least two positioning holes of the other one of the leaf springs,and the coil element is connected to the leaf springs by a thermalpressing method.

According to another aspect of the present disclosure, an electronicdevice includes the camera module of the aforementioned aspect and animage sensor, wherein the image sensor is disposed on the image surfaceof the camera module.

According to an embodiment of the present disclosure, a camera moduleincludes a metal yoke, a holding base, a plastic barrel, a plurality ofplastic lens elements, a leaf spring pair, a metal plate pair and a coilelement. The metal yoke has an opening. The holding base is connected tothe metal yoke and defines an inner space, and the holding base has athrough hole which is corresponding to the opening of the metal yoke.The plastic barrel is movably disposed in the inner space. The plasticlens elements are disposed in the plastic barrel. The leaf spring pairincludes two leaf springs which are located on a same plane andconnected to the plastic barrel. The metal plate pair includes two metalplates which are electrically connected to the leaf springs,respectively, wherein each of the metal plates includes at least twopositioning holes for connecting to the plastic barrel. The coil elementsurrounds an outer surface of the plastic barrel and is electricallyconnected to the metal plate pair, wherein one end of the coil elementis connected between the at least two positioning holes of one of themetal plates, and the other end of the coil element is connected betweenthe at least two positioning holes of the other one of the metal plates,and the coil element is connected to the metal plates by a thermalpressing method.

BRIEF DESCRIPTION OF THE DRAWINGS

The present disclosure can be more fully understood by reading thefollowing detailed description of the embodiment, with reference made tothe accompanying drawings as follows:

FIG. 1 is a schematic view of a camera module according to the 1stexample of the present disclosure.

FIG. 2 is an exploded view of the camera module according to the 1stexample of FIG. 1.

FIG. 3 is another exploded view of the camera module according to the1st example of FIG. 1.

FIG. 4 is a cross-sectional view of the camera module according to the1st example of FIG. 1.

FIG. 5 is an enlarged schematic view of the portion 5 in FIG. 4.

FIG. 6 is a schematic view of the leaf spring pair and the plasticbarrel of the camera module according to the 1st example of FIG. 1.

FIG. 7 is another schematic view of the leaf spring pair and the plasticbarrel of the camera module according to the 1st example of FIG. 1.

FIG. 8 is a bottom view of the leaf spring pair and the plastic barrelof the camera module according to the 1st example of FIG. 1.

FIG. 9 is an exploded view of a camera module according to the 2ndexample of the present disclosure.

FIG. 10 is a schematic view of the leaf spring pair and the metal platepair according to the 2nd example of FIG. 9.

FIG. 11 shows an enlarged schematic view of the portion 11 of the metalplate in FIG. 10.

FIG. 12A is a schematic view of an electronic device according to the3rd example of the present disclosure.

FIG. 12B is another schematic view of the electronic device according tothe 3rd example.

FIG. 12C is a block diagram of the electronic device according to the3rd example.

FIG. 13 is a schematic view of an electronic device according to the 4thexample of the present disclosure.

FIG. 14 is a schematic view of an electronic device according to the 5thexample of the present disclosure.

DETAILED DESCRIPTION

According to an embodiment of the present disclosure, a camera moduleincludes a metal yoke, a holding base, a plastic barrel, a plurality ofplastic lens, a leaf spring pair and a coil element. The metal yoke hasan opening. The holding base is connected to the metal yoke and definesan inner space. The holding base has a through hole which iscorresponding to the opening of the metal yoke. The plastic barrel ismovably disposed in the inner space. The plastic lens elements aredisposed in the plastic barrel. The leaf spring pair includes two leafsprings which are located on a same plane and connected to the plasticbarrel, wherein each of the leaf springs includes at least twopositioning holes for connecting to the plastic barrel. The coil elementsurrounds an outer surface of the plastic barrel and is electricallyconnected to the leaf spring pair, wherein one end of the coil elementis connected between the at least two positioning holes of one of theleaf springs, and the other end of the coil element is connected betweenthe at least two positioning holes of the other one of the leaf springs,and the coil element is connected to the leaf springs by a thermalpressing method. Compare to the conventional welding method, it isfavorable for avoiding excessive and unnecessary thermal effects on theplastic barrel by utilizing the thermal pressing method to connect thecoil element and the leaf springs. Further, it is favorable for avoidingthe leaf springs from being deformed after the thermal pressing byconnecting the coil element between the positioning holes of the leafsprings which would not affect the assembling of the leaf spring pairand the plastic barrel. Moreover, due to the arrangement of theintegrated carrier (that is, the plastic barrel of the presentdisclosure serves as a lens barrel for accommodating the plastic lenselements and a carrier for driving the plastic lens elements to shiftand focus) can greatly reduce the size of the entire camera module, theleaf spring pair is arranged closer to the plastic lens elements thanthe conventional arrangement, and it is favorable for avoiding theplastic lens from unnecessary thermal effects by utilizing the thermalpressing method. Therefore, the stability of the assembling can bemaintained and the plastic lens elements can be prevented from theexcess waste heat by connecting the coil element between the positioningholes, so as to achieve a more ideal compact camera module withautofocus function.

The at least one of the two leaf springs of the leaf spring pair canfurther include an inner fixing portion, at least one outer fixingportion and an elastic portion. The inner fixing portion is connected tothe plastic barrel, and the positioning holes are disposed on the innerfixing portion. The outer fixing portion is connected to the holdingbase. The elastic portion is connected to the inner fixing portion andouter fixing portion. By designing the distinct regional structures onthe leaf springs, the quality of the leaf spring pair can be easilydetected and mastered by the naked eye during the manufacturing process,and the assembling success rate of the leaf spring pair and the plasticbarrel can be increased.

The inner fixing portion can include a thickness reducing area, which isdeposed between the positioning holes, and the aforementioned end of thecoil element is connected to the thickness reducing area. Therefore, thethickness reducing area can be formed into a small block structure,which can increase the surface area of heat dissipation, and increasethe heat dissipation efficiency of the partial area, so as to preventthe elastic portion of the leaf spring from unnecessary thermal effects.Furthermore, the thickness reducing area can include a crossed pattern.Therefore, the contact surface area of the coil element and thethickness reducing area can be increased after thermal pressing.

Furthermore, the inner fixing portion can include a flexible structure,which is disposed between the positioning holes. Therefore, when thethermal pressing operation is performed, the pressure applied to theinner fixing portion can be further buffered so as to reduce the bendingdeformation therefrom. Moreover, the flexible structure can be a striphole. Therefore, the flexible structure can be made more easily, and theconvenience of manufacturing the leaf spring can be maintained.

In the leaf spring pair, the elastic portion of the at least one leafspring overlaps along a radial direction perpendicular to an opticalaxis. Therefore, the tilting of the plastic barrel would not occureasily during the focusing movement by lengthening the length of theelastic portion in the limited space.

In the leaf spring pair, the elastic portion of the at least one leafspring and the inner fixing portion do not overlap along a radialdirection perpendicular to the optical axis. Therefore, the elasticportion can be prevented from the effects of extra high temperature andhigh heat when the thermal pressing operation of the inner fixingportion is operated.

The plastic barrel can be a threadless structure. Therefore, the priorart carrier is not required, the additional assembling operation can begreatly reduced, the probability of assembling failure can be reduced,and assembling tolerances can be eliminated.

One end of the plastic barrel away from the holding base can be acircular-shaped, and the other end of the plastic barrel can be apolygonal-shaped. Therefore, the end with circular-shaped is favorablefor the receiving-light opening of plastic barrel to maintain stablequality during the manufacturing process, and it is not easy to producethe appearance defects, such as burrs which is easily generated by theinjection molding or shining by insufficient injection.

Moreover, the coil element surrounds the end of the plastic barrel beingthe polygonal-shaped. Therefore, it is favorable for assembling the coilelement on the plastic barrel by machine automation.

According to another embodiment of the present disclosure, a cameramodule compared to the camera module according to the aforementionedembodiment can further include a metal plate pair. The metal plate pairincludes two metal plates which are electrically connected to the leafsprings, respectively, wherein each of the metal plates includes atleast two positioning holes for connecting to the plastic barrel. Thecoil element of the camera module surrounds an outer surface of theplastic barrel and is electrically connected to the metal plate pair,wherein one end of the coil element is connected between the positioningholes of one of the metal plates, and the other end of the coil elementis connected between the positioning holes of the other one of the metalplates, and the coil element is connected to the metal plates by athermal pressing method. By the arrangement of the metal plate pair,most of the residual heat generated by the thermal pressing operationcan be absorbed by the metal plate pair, so that the area of the innerfixing portion of the leaf spring can be reduced, and the thermal effecton the elastic portion can be also reduced. Moreover, the thickness ofthe metal plate pair can be thicker than the thickness of the leafspring, and can be used as a washer for the thermal pressing operationso as to prevent the leaf spring from being deformed by pressing.

At least one of the leaf springs of the leaf spring pair can include aninner fixing portion connected to the plastic barrel, wherein the innerfixing portion includes at least two positioning holes for connecting tothe plastic barrel. Moreover, the inner fixing portion can furtherinclude a flexible structure disposed between the positioning holes.Therefore, the elastic structure can absorb the external force from thethermal pressing operation, and the leaf spring pair is prevented frombending deformation by pressing.

At least one of the leaf springs of the leaf spring pair can include anelastic portion connected to the inner fixing portion, wherein theelastic portion and the inner fixing portion do not overlap along aradial direction perpendicular to an optical axis. Therefore, theelastic portion can be prevented from the effects of extra hightemperature and high heat when the thermal pressing operation of theinner fixing portion is operated.

Each of the metal plates can further include a notch structure forreceiving the coil element. Therefore, the position of the coil elementclose to the metal plate pair can be preset to reduce the difficulty ofthermal pressing operation.

An air gap is formed between the plastic barrel and the metal platepair. Therefore, it is favorable for quickly eliminating the hightemperature and high heat of the metal plate pair so as to avoid theplastic barrel receiving all the waste heat generated by the thermalpressing operation which would increase the risk of melting of theplastic barrel and affecting the plastic lens elements in the plasticbarrel.

Each of the aforementioned features of the camera module can be utilizedin various combinations for achieving the corresponding effects.

According to another embodiment of the present disclosure, an electronicdevice includes the aforementioned camera module and an image sensor,wherein the image sensor is disposed on an image surface of the cameramodule. Therefore, an electronic device with both image quality andassembling stability can be provided.

According to the above description of the present disclosure, thefollowing specific examples are provided for further explanation.

1st Example

FIG. 1 shows a schematic view of a camera module 100 according to the1st example of the present disclosure, FIG. 2 is an exploded view of thecamera module 100 according to the 1st example of FIG. 1, and FIG. 3 isanother exploded view of the camera module 100 according to the 1stexample of FIG. 1. In FIGS. 1, 2 and 3, the camera module 100 includes ametal yoke 110, a holding base 120, a plastic barrel 130, a plurality ofplastic lens elements 141, 142, 143, 144, 145, 146, a leaf spring pair(its reference numeral is omitted), and a coil element 160.

In detail, the metal yoke 110 has an opening 111. The holding base 120is connected to the metal yoke 110 and defines an inner space (itsreference numeral is omitted). The holding base 120 has a through hole121 which is corresponding to the opening 111 of the metal yoke 110. Theplastic barrel 130 is movably disposed in the inner space. The plasticlens elements 141, 142, 143, 144, 145, 146 are disposed in the plasticbarrel 130. The leaf spring pair includes two leaf springs 151 a, 151 bwhich are located on a same plane and connected to the plastic barrel130. The coil element 160 surrounds an outer surface of the plasticbarrel 130 and is electrically connected to the leaf spring pair. Thecamera module 100 further includes an elastic supporting element 170 anda plurality of magnetic elements 180. The elastic supporting element 170is connected to the plastic barrel 130, and the magnetic elements 180are disposed in the inner space. By the arrangement, the camera module100 can provide an autofocus function.

In FIGS. 4, 5, and 6, wherein FIG. 4 is a cross-sectional view of thecamera module 100 according to the 1st example of FIG. 1, FIG. 5 is anenlarged schematic view of the portion 5 in FIG. 4, and FIG. 6 is aschematic view of the leaf spring pair and the plastic barrel 130 of thecamera module 100 according to the 1st example of FIG. 1. Each of theleaf springs 151 a, 151 b includes at least two positioning holes 152 a,152 b for connecting to the plastic barrel 130. One end 161 of the coilelement 160 is connected between the positioning holes 152 a of the leafspring 151 a, and the other end 162 of the coil element 160 is connectedbetween the positioning holes 152 b of the other one of the leaf springs151 b, and the coil element 160 is connected to the leaf springs 151 a,151 b by a thermal pressing method. That is, the leaf spring pair is twoleaf springs 151 a, 151 b electrically separated on a same plane, whichis electrically connected to the two ends 161, 162 of the coil element160, respectively. Hence, the external thermal influence on the plasticbarrel 130 can be avoided by connecting the two ends 161, 162 of thecoil element 160 to the leaf springs 151 a, 151 b in the thermalpressing method. Moreover, the two ends 161, 162 of the coil element 160are positioned between the positioning holes 152 a, 152 b, respectively,so that the leaf springs 151 a, 151 b can be prevented from beingdeformed after the thermal pressing which would affect the assemblingwith the plastic barrel 130.

In detail, each of the leaf springs 151 a, 151 b include an inner fixingportion 153 a, 153 b, at least one outer fixing portion 154 a, 154 b,and at least one elastic portion 155 a, 155 b. The inner fixing portions153 a, 153 b are connected to the plastic barrel 130, and thepositioning holes 152 a, 152 b are disposed on the inner fixing portions153 a, 153 b. The outer fixing portions 154 a, 154 b are connected tothe holding base 120. The elastic portions 155 a, 155 b are connected tothe inner fixing portions 153 a, 153 b and the outer fixing portions 154a, 154 b. In particular, in FIG. 6, in each of the leaf springs 151 a,151 b, and the number of each of the outer fixing portions 154 a, 154 band the elastic portions 155 a, 155 b is two. The two outer fixingportions 154 a are symmetrically disposed on the two sides of the innerfixing portion 153 a via the two elastic portions 155 a, and the twoouter fixing portions 154 b are symmetrically disposed on the two sidesof the inner fixing portion 153 b via the two elastic portions 155 b.Therefore, when the camera module performs autofocus, the leaf springpair can stably provide the degree of freedom of the plastic barrel 130to move along the direction of the optical axis X.

Moreover, in the 1st example, the camera module 100 further includes theelastic supporting element 170. The leaf spring pair and the elasticsupporting element 170 can be deemed as elastic supporting mechanisms,which are respectively assembled with the plastic barrel 130, andprovide the degree of freedom to the plastic barrel 130 so as to movealong the direction of the optical axis X during autofocus. In FIGS. 2and 3, the leaf spring pair is connected to one end of the plasticbarrel 130 closer to the holding base 120, and the elastic supportingelement 170 is connected to one end of the plastic barrel 130 farer awayfrom the holding base 120, wherein the leaf spring pair and the elasticsupporting element 170 can be arranged into one piece on demand (such asthe elastic supporting element 170 shown in FIG. 2) or in a group form(such as the leaf springs 151 a, 151 b of the 1st example) to form aconductor path of the coil element 160 so as to transmit the electronicdriving signal which would be input to the coil element 160, but is notlimited to the present disclosure.

In FIGS. 7 and 8, wherein FIG. 7 is another schematic view of the leafspring pair and the plastic barrel 130 of the camera module 100according to the 1st example of FIG. 1, and FIG. 8 is a bottom view ofthe leaf spring pair and the plastic barrel 130 of the camera module 100according to the 1st example of FIG. 1. In each of the leaf springs 151a, 151 b, the inner fixing portions 153 a, 153 b may include thicknessreducing area 157 a, 157 b disposed between the positioning holes 152 a,152 b respectively, and the two ends 161, 162 of the coil element 160are connected to the thickness reducing area 157 a, 157 b, respectively.By the arrangement of the thickness reducing area 157 a, 157 b, thesmall block structures can be formed, which can increase the surfacearea of heat dissipation, and improve the heat dissipation efficiency ofpartial area, so as to prevents the elastic portion 155 a, 155 b fromunnecessary thermal effect. In the 1st example, the thickness reducingarea 157 a, 157 b are a crossed pattern, which can increase the contactsurface area of the coil element 160 therewith, but the presentdisclosure is not limited thereto.

In each of the leaf springs 151 a, 151 b, the inner fixing portions 153a, 153 b may further include the flexible structures 156 a, 156 bdisposed between the positioning holes 152 a, 152 b, respectively. Bythe arrangement of the flexible structures 156 a, 156 b, when thethermal pressing operation is performed, the pressure applied to theinner fixing portion 153 a, 153 b can be further buffered so as toreduce the bending deformation therefrom. In the 1st example, theflexible structures 156 a, 156 b are a strip hole, which favorable formanufacturing the leaf springs 151 a, 151 b more easily, but the presentdisclosure is not limited thereto.

In FIG. 8, the elastic portions 155 a, 155 b of the leaf springs 151 a,151 b overlap along a radial direction D1 perpendicular to an opticalaxis X. In particular, in the limited space, the elastic portions 155 a,155 b are lengthened and arranged in the bent shape, the tilting of theplastic barrel 130 would not occur easily during the focusing movement.Furthermore, the elastic portions 155 a, 155 b of the leaf springs 151a, 151 b and the inner fixing portions 153 a, 153 b do not overlap alongthe radial direction D1 perpendicular to the optical axis X. Therefore,when the inner fixing portions 153 a, 153 b is operated by the thermalpressing operation, the elastic portions 155 a, 155 b are not affected.

In the 1st example, the plastic barrel 130 is a threadless structure.That is, the plastic barrel 130 is integrated with the carrier and thebarrel structure of the conventional art, which can effectivelyeliminate assembling tolerances and enhance the quality of the cameramodule. Moreover, in FIGS. 6 and 7, one end of the plastic barrel 130farer away from the holding base 120 is a circular-shaped and the otherend of the plastic barrel 130 is a polygonal-shaped, wherein the end ofthe circular-shaped is for receiving the incident light so as tomaintain the stable manufacturing quality and effectively avoid theappearance of flaws in the injection molding process. The coil element160 surrounds the end being polygonal-shaped of the plastic barrel 130,which is favorable for assembling the coil element 160 on the plasticbarrel 130 through machine automation.

In FIGS. 2 and 3, in the plastic barrel 130, a light blocking element140 a can be disposed between the plastic lens element 142 and theplastic lens element 143. A light blocking element 140 b can be disposedbetween the plastic lens element 143 and the plastic lens element 144. Alight blocking element 140 c can be disposed between the plastic lenselement 144 and the plastic lens element 145. The number of plastic lenselements and the number and type of the light shielding elements can bereplaced on demand, and the present disclosure would not be limitedthereto.

2nd Example

FIG. 9 shows an exploded view of a camera module 200 according to the2nd example of the present disclosure. FIG. 10 is a schematic view ofthe leaf spring pair and the metal plate pair according to the 2ndexample of FIG. 9. In FIG. 9, the camera module 200 includes a metalyoke 210, a holding base 220, a plastic barrel 230, a plurality ofplastic lens elements (not shown), a leaf spring pair (its referencenumeral is omitted), a metal plate pair (its reference numeral isomitted) and a coil element 260.

In detail, the metal yoke 210 has an opening 211. The holding base 220is connected to the metal yoke 210 and defines an inner space (itsreference numeral is omitted). The holding base 220 has a through hole221 which is corresponding to the opening 210 of the metal yoke 210. Theplastic barrel 230 is movably disposed in the inner space and theplastic lens elements are deposed in the plastic barrel 230. The leafspring pair includes two leaf springs 251 a, 251 b which are located ona same plane and connected to the plastic barrel 230. The metal platepair includes two metal plates 290 a, 290 b which are electricallyconnected to the leaf springs 251 a, 251 b and connected to the plasticbarrel 230, respectively. The coil element 260 surrounds an outersurface of the plastic barrel 230 and is electrically connected to themetal plate pair. The camera module 200 further includes an elasticsupporting element 270 and a plurality of magnetic elements 280. Theelastic supporting element 270 is connected to the plastic barrel 230,and the magnetic elements 280 are disposed in the inner space. By thearrangement, the camera module 200 can provide an autofocus function.

FIG. 11 shows an enlarged schematic view of the portion 11 of the metalplate 290 b in FIG. 10. In the 2nd example, the camera module 200includes the metal plate pair, which includes two metal plates 290 a,290 b. Each of the metal plates 290 a, 290 b includes at least twopositioning holes 291 a, 292 b for connecting to the plastic barrel 230.One end (its reference numeral is omitted) of the coil element 260 isconnected between the positioning holes 291 a of the metal plate 290 a,and the other end 261 of the coil element 260 is connected between thepositioning holes 291 b of the other one of the metal plates 290 b, andthe coil element 260 is connected to the metal plates 290 a, 290 b by athermal pressing method. Different from the 1st example, the cameramodule 200 of the 2nd example further includes the metal plate pair,which can absorb most of the residual heat of the thermal pressingoperation so as to further reducing the area of the leaf spring pair andreducing the influence of residual heat. Moreover, the thicknesses ofthe metal plates 290 a, 290 b can be larger than that the thicknesses ofthe leaf springs 251 a, 251 b, and can be used as a washer for thethermal pressing operation to reduce the leaf springs 251 a, 251 b frompressing and the deformation thereof.

In FIG. 11, the metal plates 290 a, 290 b can further include notchstructures 292 a, 292 b for receiving the coil element. Therefore, thetwo ends of the coil element 260 close to the metal plates 292 a, 292 bcan be preset to reduce the difficulty of thermal pressing operation.Moreover, in FIG. 10, an air gap 231 is formed between the plasticbarrel 230 and the metal plate pair. That is, the air gap 231 is formedbetween the plastic barrel 230 and the metal plate pair. Therefore, itis favorable for quickly eliminating the high temperature and high heatof the metal plate pair so as to avoid the plastic barrel receiving allthe waste heat generated by the thermal pressing operation, andincreasing the risk of melting and affecting the plastic lens elementsin the plastic barrel.

In FIG. 10, the leaf springs 251 a, 251 b respectively include innerfixing portions 253 a, 253 b and are connected to the plastic barrel230. In detail, the inner fixing portions 253 a, 253 b include at leasttwo positioning holes 252 a, 252 b for connecting to the plastic barrel230. The inner fixing portions 253 a, 253 b can further include theelastic structures 256 a, 256 b, which are disposed between thepositioning holes 252 a, 252 b. Moreover, the leaf springs 251 a, 251 bcan further include the elastic portions 255 a, 255 b, which areconnected to the inner fixing portion 253 a, 253 b, respectively. In the1st example of FIG. 8, the elastic portions 255 a, 255 b of the 2ndexample overlap along a radial direction perpendicular to an opticalaxis, and the elastic portion 255 a, 255 b and the inner fixing portion253 a, 253 b do not overlap along the radial direction perpendicular tothe optical axis.

Moreover, the leaf springs 251 a, 251 b can further include the outerfixing portion 254 a, 254 b, which are connected to the elastic portion255 a, 255 b. In particular, in FIG. 10, each of the leaf springs 251 a,251 b, and the number of the outer fixing portions 254 a, 254 b and thenumber of the elastic portions 255 a, 255 b are two, respectively. Thetwo outer fixing portions 254 a are symmetrically disposed on the twosides of the inner fixing portion 253 a via the two elastic portions 255a, and the two outer fixing portions 254 b are symmetrically disposed onthe two sides of the inner fixing portion 253 b via the two elasticportions 255 b.

Moreover, in the 2nd example, the number and arrangement of the plasticbarrel and the arrangement of other optical components may be the sameas the arrangements of the 1st example, and are not described againherein.

In FIG. 9, the camera module 200 further includes the elastic supportingelement 270 for cooperating with the leaf spring pair to provide thedegree of freedom of the plastic barrel 230 to move along the directionof the optical axis during autofocus. Moreover, the camera module 200further includes an auxiliary frame 212 and a plurality of suspensionlines 213. The auxiliary frame 212 is disposed in the metal yoke 210,which is for positioning the magnetic elements 280, it is favorable forensuring the plastic lens elements in the plastic barrel 230 to movealong the direction of the optical axis during autofocus. The suspensionlines 213 connect the auxiliary frame 212 and the holding base 220 so asto maintain the stability of the mechanism during autofocus.

Furthermore, when the camera module 200 is applied on the electronicdevice, the imaging element 295 can be disposed on the holding base 220.

3rd Example

FIG. 12A is a schematic view of an electronic device 30 according to the3rd example of the present disclosure, and FIG. 12B is another schematicview of the electronic device 30 according to the 3rd example. In FIGS.12A and 12B, the electronic device 30 of the 3rd example is a smartphone, and the electronic device 30 includes the camera module 31according to the present disclosure and the image sensor 32, wherein thecamera module 31 can be any one of the camera modules in the foregoingexamples, but will not be limited thereto, and the image sensor 32 isdisposed on an image surface (not shown) of the camera module 31.Therefore, it is favorable for satisfying requirements of the massproduction and appearance of the camera module applied to the electronicdevice nowaday.

Furthermore, the user enters the shooting mode through the userinterface 38 of the electronic device 30, wherein the user interface ofthe 3rd example can be a touch screen 38 a, a button 38 b, etc. At thistime, the camera module 31 collects the imaging light on the imagesensor 32, and outputs an electronic signal about the image to an ImageSignal Processor (ISP) 37.

FIG. 12C shows a block diagram of the electronic device 30 according tothe 3rd example, and particularly a camera block diagram in theelectronic device 30. In FIGS. 12A to 12C, in response to the cameraspecifications of the electronic device 30, the electronic device 30 mayfurther include an optical anti-shake component 34. Furthermore, theelectronic device 30 can further include at least one auxiliary opticalelement 36 and at least one sensing element 35. The auxiliary opticalelement 36 can be a flash module that compensates for color temperature,an infrared ranging component, a laser focusing module, etc. The sensingelement 35 can have a function of sensing physical momentum andactuation energy, such as an accelerometer, a gyroscope, and a HallEffect Element to sense the shaking and shaking applied by the user'shand or the external environment. Further, the autofocus function andthe optical anti-shake component 34 configured by the camera module 31in the electronic device 30 are facilitated to obtain good imagingquality, and the electronic device 30 according to the presentdisclosure has a plurality of modes of shooting functions, such asoptimized self-timer, low light source HDR (High Dynamic Range imaging),high resolution 4K (4K Resolution) video. Moreover, the user candirectly view the camera's shooting screen from the touch screen andmanually operate the viewing range on the touch screen to achieve theautofocus function of what you see is what you get.

Moreover, in FIG. 12B, the camera module 31, the image sensor 32, theoptical anti-shake component 34, the sensing element 35 and theauxiliary optical element 36 can be disposed on a Flexible PrintedCircuit Board (FPC) 39 a and electrically connected to the imagingsignal processing component 37 through the connector 39 b to execute thephotographing process. The current electronic devices, such as smartphones, have a thin and light trend. The camera module and its imaginglens and related components are arranged on a flexible circuit board,and then the circuit is integrated into the main board of the electronicdevice by using a connector, which can meet the limited space of themechanism design and the circuit layout requirements, and the greatermargin is achieved, and the autofocus function of the imaging lens ismore flexibly controlled by the touch screen of the electronic device.In the third embodiment, the electronic device 30 can include aplurality of the sensing elements 35 and a plurality of the auxiliaryoptical elements 36. The sensing elements 35 and the auxiliary opticalelements 36 are disposed on the FPC board 39 a and at least one otherFPC board (no label) and electrically connected to the imaging signalprocessing component 37 through the corresponding connector to executethe photographing process. In other embodiments (no view), the sensingelement and the auxiliary optical element can also be disposed on themain board of the electronic device or other forms of the carrieraccording to the mechanism design and the circuit layout requirements.

Furthermore, the electronic device 30 can further include, but is notlimited to, a display unit, a control unit, a storage unit, a RandomAccess Memory unit (RAM), a Read-Only Memory unit (ROM), or acombination thereof.

4th Example

FIG. 13 shows a schematic view of an electronic device 40 according tothe 4th example of the present disclosure. The electronic device 40 ofthe 4th example is a tablet computer. The electronic device 40 includesa camera module 41 according to the present disclosure and an imagesensor (not shown), wherein the image sensor is disposed on an imagingsurface (not shown) of the camera module 41.

5th Example

FIG. 14 shows a schematic view of an electronic device 50 according tothe 5th example of the present disclosure. The electronic device 50 ofthe 5th example is a wearable device. The electronic device 50 includesa camera module 51 according to the present disclosure and an imagesensor (not shown), wherein the image sensor is disposed on an imagingsurface (not shown) of the camera module 51.

The foregoing description, for purpose of explanation, has beendescribed with reference to specific embodiments and examples. Theembodiments and examples were chosen and described in order to bestexplain the principles of the disclosure and its practical applications,to thereby enable others skilled in the art to best utilize thedisclosure and various embodiments and examples with variousmodifications as are suited to the particular use contemplated. Theexamples depicted above and the appended drawings are exemplary and arenot intended to be exhaustive or to limit the scope of the presentdisclosure to the precise forms disclosed. Many modifications andvariations are possible in view of the above teachings.

What is claimed is:
 1. A camera module, comprising: a metal yoke havingan opening; a holding base connected to the metal yoke and defining aninner space, the holding base having a through hole which iscorresponding to the opening of the metal yoke; a plastic barrel movablydisposed in the inner space; a plurality of plastic lens elementsdisposed in the plastic barrel; a leaf spring pair comprising two leafsprings which are located on a same plane and connected to the plasticbarrel, wherein each of the leaf springs comprises at least twopositioning holes for connecting to the plastic barrel; and a coilelement surrounding an outer surface of the plastic barrel andelectrically connected to the leaf spring pair, wherein one end of thecoil element is connected between the at least two positioning holes ofone of the leaf springs, and the other end of the coil element isconnected between the at least two positioning holes of the other one ofthe leaf springs, and the coil element is connected to the leaf springsby a thermal pressing method.
 2. The camera module of claim 1, whereinat least one of the two leaf springs of the leaf spring pair furthercomprises: an inner fixing portion connected to the plastic barrel, andthe at least two positioning holes disposed on the inner fixing portion;at least one outer fixing portion connected to the holding base; and atleast one elastic portion connected to the inner fixing portion and theouter fixing portion.
 3. The camera module of claim 2, wherein the innerfixing portion comprises: a thickness reducing area disposed between theat least two positioning holes, and the end of the coil element isconnected to the thickness reducing area.
 4. The camera module of claim3, wherein the thickness reducing area comprises a crossed pattern. 5.The camera module of claim 2, wherein the inner fixing portioncomprises: a flexible structure disposed between the at least twopositioning holes.
 6. The camera module of claim 5, wherein the flexiblestructure is a strip hole.
 7. The camera module of claim 2, wherein theelastic portion of the at least one leaf spring overlaps along a radialdirection perpendicular to an optical axis.
 8. The camera module ofclaim 2, wherein the elastic portion of the at least one leaf spring andthe inner fixing portion do not overlap along a radial directionperpendicular to an optical axis.
 9. The camera module of claim 1,wherein the plastic barrel is a threadless structure.
 10. The cameramodule of claim 1, wherein one end of the plastic barrel away from theholding base is a circular-shaped, and the other end of the plasticbarrel is a polygonal-shaped.
 11. The camera module of claim 10, whereinthe coil element surrounds the end of the plastic barrel being thepolygonal-shaped.
 12. An electronic device, comprising: the cameramodule of claim 1; and an image sensor disposed on an image surface ofthe camera module.
 13. A camera module, comprising: a metal yoke havingan opening; a holding base connected to the metal yoke and defining aninner space, the holding base having a through hole which iscorresponding to the opening of the metal yoke; a plastic barrel movablydisposed in the inner space; a plurality of plastic lens elementsdisposed in the plastic barrel; a leaf spring pair comprising two leafsprings which are located on a same plane and connected to the plasticbarrel; a metal plate pair comprising two metal plates which areelectrically connected to the leaf springs, respectively, wherein eachof the metal plates comprises at least two positioning holes forconnecting to the plastic barrel; and a coil element surrounding anouter surface of the plastic barrel and electrically connected to themetal plate pair, wherein one end of the coil element is connectedbetween the at least two positioning holes of one of the metal plates,and the other end of the coil element is connected between the at leasttwo positioning holes of the other one of the metal plates, and the coilelement is connected to the metal plates by a thermal pressing method.14. The camera module of claim 13, wherein at least one of the two leafsprings of the leaf spring pair further comprises: an inner fixingportion connected to the plastic barrel, wherein the inner fixingportion comprises at least two positioning holes for connecting to theplastic barrel.
 15. The camera module of claim 14, wherein the innerfixing portion further comprises: a flexible structure disposed betweenthe at least two positioning holes.
 16. The camera module of claim 13,wherein at least one of the two leaf springs of the leaf spring pairfurther comprises: at least one elastic portion overlaps along a radialdirection perpendicular to an optical axis.
 17. The camera module ofclaim 13, wherein at least one of the two leaf springs of the leafspring pair further comprises: an inner fixing portion connected to theplastic barrel; and at least one elastic portion connected to the innerfixing portion; wherein the elastic portion and the inner fixing portiondo not overlap along a radial direction perpendicular to an opticalaxis.
 18. The camera module of claim 13, wherein each of the metalplates further comprises a notch structure for receiving the coilelement.
 19. The camera module of claim 13, wherein an air gap is formedbetween the plastic barrel and the metal plate pair.